CODEWITHSUNDEEP
pythonclassinheritance
Illusionist
Illusionist

Reputation: 5489

How do i instantiate this inherited class

Ok this should be trivial, but i am stuck- the code is existing and should be fine. 

 class Connect(object):
    def __init__(self, database, user, password, host, port):
        super(Connect, self).__init__()
        self.database = database
        self.user = user
        self.password = password
        self.host = host
        self.port = port

 class Process(Connect):
    def __init__(self, **kwargs):
        super(Process, self).__init__(**kwargs)

I can instantiate Connect easily

local_connection=Connect(database, user, password, host, port)

How do I instantiate Process?

If I do Process(database, user, password, host, port) - Error is - TypeError: init() takes exactly 6 arguments (1 given)

If I do 

Process(local_connection)

Error is - TypeError: init() takes exactly 1 argument (2 given)

If i try

Process()

Errorr is - TypeError: init() takes exactly 6 arguments (1 given)

Upvotes: 0

Views: 131

Answers (1)

Moinuddin Quadri
Moinuddin Quadri

Reputation: 48047

You can fix this in two ways:

  1. create a Process's object along with argument's name as: 

    >>> Process(database='database', user='user', password='password', host='host', port='port')
<__main__.Process object at 0x7f4510150a10>

  2. OR, Use *args along with **kwargs in Process.__init__() as:

    class Process(Connect):
    def __init__(self, *args, **kwargs):
        super(Process, self).__init__(*args, **kwargs)

    and just pass param to __init__() without arguments as:

    >>> Process('database', 'user', 'password', 'host', 'port')
<__main__.Process object at 0x7f4510150950>

Please also refer: What does ** (double star) and * (star) do for parameters? for knowing the difference between *args and **kwargs.

Upvotes: 1

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